Collapsible tube



March 17, 1931.

FQJ. LYNCH COLLAPSIBLE TUBE Filed March 29, 1950 WITNESSES Maw W I J .1 I'r INVENT R FrankfLyzza/z M ATTOR N EYS Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE FRANK :r. LYNCH, or HILLSIDE, NEW JERSEY, ASSIGNOR T0 PIQNAUD, Inc, OF'NEW YORK, N. Y., A CORPORATION or NEW YORK COLLAPSIBLE TUBE Application filed March 29, '1830. Serial No. 439,992.

This invention relates to collapsible tubes to be used for tooth paste, shaving cream, glue and other plastic or sem1-plast1c material, the object being to provide a tube which 5 may be readily collapsed when desired, but which is efficiently sealed against leakage when closed.

A further object of the invention is to provide in a collapsible tube a cap which has in a plurality of annular sealing points.

A. further object, more specifically, is to provide a sealing tube having a screw cap coacting with a plurality of packing members whereby the packing members present 1; a plurality of spaced sealing points in connection with the cap and end of the tube so that there will be no leakage from the tube.

In the accompanying drawings Figure 1 is a perspective view of a com- 521) plete tube before the bottom end has been closed;

Figure 2 is a side view on a large scale of the tube shown in Figure 1, the upper partbeing shown in section;

7' Figure 3 is a perspective view of one of the sealing washers shown in Figure 2; and

Figure 4 is a perspective view of a sealing ring shown in Figure 2.

Referring to the accompanying drawings :3: by numerals, 1 indicates a body which is preferably formed through the well known extruding action and is preferably thin so that the lower end of the bottom 2 may be collapsed and bent over for providing a 3 tight closure at that end. At the top the body 1 merges into a thickened end 3 which is terraced as shown in Figures 1 and 2. By reason of this terraced formation a neck l is provided which is threaded externally and which has a bore extending entirely therethrough.

The bottom of the neck 4 merges into an annular ring section 5 which has an upstanding annular shoulder merging into an annular section 7, which in turn merges into an annular tubular portion 8, and this portion in turn merges into an annular ring 9. By reason of this formation there is an annular groove between the shoulder 6 and the neck 50 4t and in this groove is placed a packing ring fibre or other desired material.

10. The ring lO may be made of rubber, fibre, or other desired material, and is adapted to have the edges thereof pinched by the flange 11 and the lower edge of the cap 12.

The cap 12 is internally threaded and is provided with a top plate 13 which presses This arrangement is very desirable: for certain highly perfumed tooth pastes or other material as it prevents the odor from cscaping. In fact, this arrangement would permit the use of the tube with liquid perfumery provided the bottom of the tube could be properly sealed.

In order that the cap may be screwed on "7 tightly to position to cause the sealing points to function properly corrugations 16 and 17 are provided whereby a good finger or hand held may be secured. It will be noted that at each annular sealing point a com i)ara tively narrow edge is presented whereby these narrow edges easily compress the packin or sealing members. and consequently this presents a perfect sealing arrangement. of course, understood that the cap is to be unscrewed whenever any of the contents is to be ejected, but by reason of the roughened portions 16 and 17 the cap may be again screwed into place tightly for maint V the seal.

WVhat I claim is:

1. A container comprising a body. a rigid end integral with the body, said end having a threaded neck and a depressed portion sur- H rounding said neck, a sealing washer posi-' tioned in said depressed portion and extending from one side thereof to the other, and a cap formed with internal threads adapted to be screwed onto said neck, said cap having I A a plurality of spaced annular sealing edges in the same plane positioned to contact with said washer at spaced points.

2. A collapsible tube comprising acollapsible body, a rigid end integral with the body formed with an externally threaded hollow-neck, a primary sealing washer surrounding said neck, and a cap adapted to be screwed on to said neck, a secondary sealing Washer carried by said cap and positioned to seal the contact between the cap and the top of the neck, said cap having a pair of an nular contact edges adapted to pinch said primary sealing washer, whereby a plurality of spaced sealed edges are presented.

3. A container comprising a body, a rigid end having-a neck, a sealing ring surrounding said neck, a cap for said neck, said cap having a top plate adapted to bear against the upper edge of said neck while the inner edge presses against said sealing ring, said cap being also provided with a spaced annular flange positioned to press against said sealing ring when the cap is screwed into a closed position.

4. In a collapsible tube, an end formed with an externally threaded neck, an annular groove adjacent the base of said neck, a sealing washer partly filling said groove, a sealing Washer for the top of said neck, and a cap adapted .to be screwed on to said neck, said cap having a top plate adapted to be pressed against said sealing washer, and a pair of annular members adapted to press against, respectively, the inner and outer edges of saidsealing ring, whereby there will be a three-point sealingcontact between the cap and the top of the tube.

FRANK J. LYNCH. 

